“That looks like the powder inside a nightflower,” Birgitte said. She felt wary.

Aludra shot the Warder a glance. “And how do you know what is inside a nightflower, Maerion? You do realize how dangerous it is to open one of those, yes?”

Birgitte shrugged.

Aludra frowned, but got no response, so took a deep breath and calmed herself. “The device, it is perfectly safe. We set up the other dragon to do the firing, so there would be no danger, yes? But there would not be danger anyway. The casting is good and my calculations, they are perfect.”

“Elayne,” Birgitte said, “I still think we’d be better off watching from the wall down below. Even if this one beside us isn’t going to be lit.”

“After all I went through to get up here?” Elayne asked. “No thank you. Aludra, you may proceed.”

She ignored Birgitte’s annoyance. Did Aludra really think she could hit one of those dressing dummies with her iron sphere? That was a long way to go, and the sphere was so small, barely wider than a man’s outstretched palm. Had Elayne invested all of this effort to get something that would work more poorly than a catapult? This dragon sounded as if it could throw its sphere farther, but the boulders tossed by a catapult were many times larger.

The men finished. The remaining man touched a small torch to a fuse sticking out of the sphere and rolled it into the tube; then they turned the tube to face directly outward.

“You see?” Aludra said, patting the dragon. “Three men is best. Four for safety, in case one falls. One could do the work if he had to, but it would be slow.”

The men stepped back as Aludra got out a red flag. She held it up in the air, signaling the other team on the next tower down the wall. Elayne focused on them with the glass. One carried a small torch. Mat watched with a curious expression.

Aludra lowered her flag. The soldier touched his burning torch to the side of the dragon.

The explosive sound that followed was so powerful that it made Elayne jump. The boom was as sharp as a thunderclap, and she heard in the distance what sounded like an echo of the explosion. She raised a hand to her breast, and remembered to draw breath.

A pocket on the hillside exploded in a massive spray of dust and earth. The ground seemed to tremble! It was as if an Aes Sedai had torn up the earth with a weave, but the One Power hadn’t been used at all.

Aludra seemed disappointed. Elayne raised her looking glass to her eye. The blast had missed the dressing dummies by a good twenty paces, but had ripped a hole in the ground five paces wide. Did the ball explode like a nightflower to cause that? This device wasn’t merely an improved catapult or trebuchet; it was something else. Something capable of smashing an iron sphere into the ground with such force that it blew open a hole, then perhaps exploded on its own.